cross-posted from: https://aussie.zone/post/2534398
The 10GBase-LR is 1310nm and the QSFP-40G-LR4 CWDM channels are 1271, 1291, 1311 and 1331 nm. Are the 1310nm and 3rd channel 1311nm technically compatible?
I have a 10Gb and (will eventually have) a 40Gb switch both fitted with basic LR (Q)SFP+ transceivers and want to know if I can directly connect them or will I have to use an adapter to fit an SFP+ in an QSFP+ port?
I’m looking at using the XQX2502 QSFP+.
EDIT: The goal of this exercise is I’m trying to work out if I can make an easily interoperable system where a singlemode fiber wall jack fed from a 40G switch can act as a both a 10G or 40G port as needed.
No the 10LR have a to wide of a bandwidth, so it will interference the other channels.
If the switch support QSPF breakout, a CWDM-10LR may work.
but it cheaper to by
Then to by 1 CWDM 10G.
Yes I am aware of that solution. I should have clarified the goal of the exercise. I’m trying to work out if I can make an easily interoperable system where a singlemode fiber wall jack fed from a 40G switch can act as a both a 10G or 40G port as needed depending on what ethernet card the client is using. I am using singlemode as I want to avoid using MTP multimode cable seeing how much more expensive it is than simple lc-lc singlemode.
I understand the use case.
I stand by it is easy to get right, if optic is changing for the difference use cases.
QSPF is not build to be hotplug in that manner.